well I'm not sure but I think this is Amphitheatre Mountain: from SummitPost - Amphitheater Mountain is one of the vast majority of Glacier National Park peaks with no established trail to its summit. As is pretty much the norm in this park, initial access to the mountain is via a very good NPS trail, but upon reaching the point at which plans for the day lead "up" (with the trail continuing on, tantalizingly and subversively, further into the mountains), you are, so to speak, on your own.